ZBrush Support is available during the following hours:
Monday through Friday from 9 am to 5 pm Pacific time.
We are closed Saturday, Sunday and holidays.
If you are unsure what the current time is, please see http://www.timeanddate.com/worldclock/usa/los-angeles
During business hours we are available to assist with matters regarding installation, activation, licensing, account changes and software delivery. For questions regarding how to use ZBrush's features, please use the ZBrush Help & Support category at www.ZBrushCentral.com. (You must be a ZBC member and logged in to view those forums.)
We attempt to handle all support conversations within one business day. Please be aware that during peak periods such as the weeks immediately following a new version release it can take longer.